Shrub rose plant named `Ivtagolf`

ABSTRACT

The new cultivar is a variety of shrub rose plant having a broad bushy growth habit. The single flowers are very small to small and white in color.

BACKGROUND OF THE NEW PLANT

This discovery relates to a new and distinct variety of shrub rose plantidentified by the varietal name of `Ivtagolf`. The new variety wasdiscovered in a selected breeding program at Stichting DLO-Centrum voorPlantenveredelings- en Reproduktieonderzoek (CPRO-DLO) in Wageningen,The Netherlands in 1984. The goal of the breeding program was to developcultivars of pot roses and patio roses. The new variety is a selectionfrom the crossing of unnamed varieties of R. multiflora and R.elegantula.

The first asexual reproduction took place at Stichting DLO-Centrum voorPlantenveredelings- en Reproduktieonderzoek (CPRO-DLO) in Wageningen,The Netherlands in 1990 and the new variety has been propagated bycutting, stenting and grafting on R. dumetorum `laxa`. Continuedobservations from the vegetative cuttings have confirmed that thedistinguishing features of the new variety remain stable and areretained through successive propagations.

DESCRIPTION OF THE DRAWING

The accompanying photographic drawings illustrate the new variety, withthe color being as nearly true as is possible with color illustrationsof this type. Sheet 1 illustrates the overall plant habit of the newcultivar and Sheet 2 illustrates a close-up view of the bloom andfoliage of the new cultivar.

DESCRIPTION OF THE NEW PLANT

The following detailed descriptions set forth the characteristics of thenew variety. The data which define these characteristics were collectedfrom asexual reproductions carried out at Stitchting DLO-Centrum voorPlantenveredelings- en Reproduktieonderzoek (CPRO-DLO) in Wageningen,The Netherlands. Color references are primarily to the R.H.S. ColourChart of The Royal Horticultural Society of London.

PLANT

Varietal Name: Ivtagolf.

Commercial name: Golf.

Botanical name: Rosa l.

Size:

Height.--80-100 cm.

Width.--60-80 cm.

Habit: Shrub.

Growth vigor: Vigorous.

Wood color: Green Group 137C.

Thorns:

Color.--Yellow-Green Group 151A.

Size.--About 0.6 cm long.

Shape.--Concave.

Location on stem and branches.--About equal number of thorns on the maincanes from the base and on the lateral branches; very few in number.

Disease resistance: Under normal outdoor climate and weather conditionswith no long periods of coldness, dryness, or wetness, resistant toblack spot and mildew.

FOLIAGE

Arrangement: Compound.

Compound leaf size: 8.0 by 7.0 cm.

Leaflets:

Number on typical stem leaves.--7-9.

Size.--Small, about 3.5 by 2.0 cm.

Color.--Upper surface: Yellow-Green Group 147A. Lower surface:Yellow-Green Group 146A.

Shape.--Ovate.

Texture.--Upper side, glossy.

Margin.--Single, small serrations.

Petiole rachis.--Color: Yellow-Green Group 146C. Texture: Rough, withglands along the side.

Stipules.--Serrated.

BUDS

Size: About 0.8 cm by 0.7 cm.

Shape: Short, ovate.

Color: Yellow-Green Group 144A.

Color changes during opening: None.

Sepals:

Arrangement.--Slightly foliated.

Color.--Upper surface: Green Group 138B. Lower surface: Yellow-GreenGroup 144A.

Texture.--Sparsely covered with fine hairs.

Receptacle:

Color.--Yellow-Green Group 144A.

Shape.--Pear shaped, about 0.3 cm by 0.6 cm.

Texture.--Smooth.

Peduncle:

Color.--Yellow-Green Group 144A.

Length.--3 cm (average).

Strength.--Stiff, erect.

Texture.--Smooth.

FLOWER

Borne: 50-60 per cluster.

Size: 3.5-4.0 cm in diameter.

Form: Single flowered, flat.

Petals:

Number per floret.--5.

Color.--Upper surface: White. Lower surface: White. Color changes withmaturity: None.

Texture.--Thick.

Size.--About 1.5 cm by 1.0 cm.

Shape.--Heart shaped.

Arrangement.--Imbricated.

Persistence: Petals drop off cleanly.

Lastingness: 3-5 days.

Fragrance: None.

Blooming period: Long, recurrent flowering.

REPRODUCTIVE ORGANS

Stamens:

Number.--75-90 per flower.

Anther.--Length: About 1.0 mm. Color: Yellow-Orange Group 15A. Pollencolor: Yellow-Orange Group 15B.

Filament.--Length: About 5 mm. Color: Yellow-Orange Group 15C.

Pistils:

Number.--20-25 per flower.

Style.--Color: Green-Yellow Group 1C. Length: About 0.7 cm.

Stigma.--Color: Green-Yellow Group 1B. Length: About 1.0 mm.

We claim:
 1. A new and distinct variety of rose plant